Louvering system



Dec. 16, 1958' P. KATZ 2,864,301

LOUVERING SYSTEM Filed Nov. 13, 1953 INVENYLOR: E57 7 PETER KATZ,

HIS AGENTS,

United States Patent f LOUVERING SYSTEM Peter Katz, Baldwin, N. Y.,assignor to American Measuring Instruments Corp., a corporation of NewYork Application November 13, 1953, Serial No. 391,886 6 Claims. (CI.98-40) The invention relates to louvering systems, and relates moreparticularly to the control of streams of air flowing in a passage, suchas exhaust ducts, for instance of air conditioning equipment.

The invention has among its objects to provide for the control of thesize of the passage, for controlling a stream of air in said passage,and to deflect said stream in one or more directions simultaneously.

The foregoing and other objects of the invention will be best understoodfrom the following description of exemplifications thereof, referencebeing had to the accompanying drawings, wherein:

Fig. 1 is a front elevational view of a louver structure, showing theparts in one position with the slats closed, in accordance with theinvention;

Fig. 2 is a sectional view taken on line 2-2 of Fig. 1;

Fig. 3 is a diagrammatic longitudinal sectional view.

of the louver structure showing two shutters in one position in thepassage;

Fig. 4 is a diagrammatic view similar to Fig. 3 showing the two shuttersin another position in the passage;

Fig. 5 is a schematic sectional view similar to Fig. 2, but showing theslats in a different, though open, position;

Fig. 6 is a schematic sectional view similar to Fig. 5, but showing theslats in open position; and

Fig. 7 is a large-scale elevational view of a segment of one of theparts shown in Fig. 1.

In carrying the invention into effect in one of the embodiments whichhas been selected for illustration in the accompanying drawings and fordescription in this specification, and referring now particularly toFigs.'1 and 2, there is provided a louver structure generally indicatedat 11. The structure 11 comprises a duct of frame 12 that defines apassage 13 that has a terminal front opening 14. The frame 12 has a topwall 15, a bottom wall 16, side walls 17 and 18, and a partition 19.

The partition 19 divides the passage 13 into two passage sections 20 and21. In the drawing there are shown only two passage sections 213 and 21,but it will be understood that the passage 13 may be sub-divided intomore than two sections, or may be made without sub-division as a singlepassage.

A shutter is disposed in each passage section, the shutter generallyindicated at 22 being disposed in the section 20, and the shuttergenerally designated 23 being disposed in the section 21. Each of theshutters 22 and 23 may either be composed of one piece, of cast, forgedor molded material as indicated diagrammatically in Figs. 3 and 4 or maybe composed of similar segments 24 of the type shown in Fig. 7.

The shutters 22 and 23 are mounted for rotation in the passage 13. Eachshutter 22 may be mounted on a separate rotatable member, for instancethe shutter 22 on a shaft 25 and the shutter 23 on a shaft 26. Each ofthe shafts 25 and 26 is journalled in one of the side walls 17 and 18 inthe partition 19, and the shaft 25 is secured to the shutter 22 andcarries a knob 27 for stationary shaft may be provided for both shutters22 and 23 to be turnable thereon freely, for instance manually.

Each of the shutters carries a series of inclined parallel ellipticaldisks 29. The disks have their major axes forming an angle A with theaxis B of the shaft, while their minor axes are perpendicular to axis Band that axis B is disposed transverse in a cross-section plane of thepassage 13 parallel with the opening 14. Diametrally intersecting thedisks '29 of each shutter and disposed on each of the shafts 25 and 26is a large slat 30 with convex sides. a slat 30. The shutter may also beprovided with two smaller slats 31 having convex sides. The smallerslats 31 are disposed parallel to the large slat 30 and are spacedtherefrom for a distance a which is sufliciently large to permit theflow of air through the passage 13 in two large equal streams. The smallslats 31 are furthermore spaced from the periphery of the disks 29. bydistance b to further divide the stream of air into. smaller streamsbetween the slats 31 and walls 15, 16.

The disks 29 intersect the slats 30 and 31 to form an integral shutterunit therewith.

The large slat 30 has a width L which is only slightly smaller than theheight H of the passage 13, and extends throughout its passage section.Thus, as best shown in Fig. 2, when a shutter is turned so that thelarge slat is positioned across the passage 13, it will substantiallyclose that passage section, effectively block-. ing a stream of airflowing in that passage section. Each 30 and 31 direct upwardly the airthat emerges at the opening 14. By turning the shutter about its axi ofrotation, provided by the shaft, the slats may be positioned in anyposition, either substantially closing the passage (Fig. 2), orproviding only a minimum resistance to the passage of air (Fig. 6), orvarious degrees of upward direction or downward direction of the airemerging at the opening 14 radially of said axi B.

In addition to the aforementioned deflection of the air, which takesplace radially of the axis B of rotation, and is provided by the slats30 and 31, another deflection is provided by the disks 29. By rotating ashutter about its axis B the disks 29 are rotated along therewith. Forinstance, a rotation of about will turn the disks 29 of the shutter 22from the rightward deflection position shown in Fig. 3 to the leftwarddeflection position shown in Fig. 4. The shutter 23 can be turnedindependently of the shutter 22, either to align its disks 29 with thoseof the shutter 22 or at an angle thereto, for instance oppositelythereto (Fig. 3).

Figs. 3 and 4 are diagrammatic representations of the shutters 22 and 23in either sectional or one piece form as mentioned above. In one pieceform each shutter includes a plurality of spaced parallel ellipticaldisks 29 each obliquely disposed at an acute angle to the longitudinalcentral axes of slats 30 and 31 and to the axes of shafts 25, 26. Theshutters are turned as independent units on shafts 25 or 26 by means ofknobs 27 or 28 respectively.

The combined action of the slats 30 and 31 and of the disks 29 thereforemakes it possible to direct air emanating from the passage 13 eitherstraight or upward and downward, as well as sidewardly, and also en-Patented Dec. 16, 1958 Each shaft passes axially through.

3 ables to effectuate substantially full closure of the passage (Fig.2).

Where the shutter is segmented (Fig. 7), each segment 24 may be providedwith tWopins: or dowels:. 32 and twomatching. bores 33 adapted toreceive the PIES 32 of the next adjoining segment24;

It will beapparent to those skilled inthe art that the.

novel principles of the invention disclosed herein in connection withspecific exemplifications thereof will'suggest.various othermodifications and applications of the same. It is accordingly desiredthat in construing the breadth of the append'edclaims they shall notbelimited to the specific exemplifications. of'theinvention described.

herein.

Having thusdescribed. the. invention, what I claim as new and desire tobe secured by Letters Patent, is as follows:

1. A louver structure, comprising a frame having perpendicularlydisposedtop, bottom and side walls defining a rectangular passage, afirst slat disposed transversely across the passage and mounted foraxial rotation between opposite side walls thereof, said slat having awidth substantially equal to the height of the passage so that the slatcloses-the passage when disposed in one position and restricts thepassage in all other positions of the slat, a disk intersecting saidslat at an acute angle to a central axis thereof to deflect air flowingthrough the passage into several streams moving at said angle to saidslat, and a pair of further slats smaller in width than the first slatand spaced parallel thereto in said passage, said further slatsintersecting said disk at said angle to divide the flow of air in thepassage into still further streams, said first slat, disks and smallerslats being formed as an integral shutter unit rotatable simultaneouslyin the passage so that said streams are directed angularly with respectto said top, bottom and side walls in all of said other positions of thefirst slat.

2. A louver structure according to claim 1, further comprising a shaftextending axially through the first slat and' journaled in the sidewalls.

3. A louver structure according to claim 2, further comprising amanually operable member disposed outside one of' the side walls andsecured to one end of the shaft for rotating said shutter.

4. A rotatable louver structure comprising a first gen: erally fiatslat, an ellipticalair deflector disk disposed at an acute angle to acentral axis of said slat and diarnetrally intersecting the slat, and apair of other slats disposed parallel to each other and respectivelyspaced from the opposite sides of the first slat, said pair of slatsintersecting said disk so that the disk and slats form an integral unit,said unit being provided at portions thereof with means for engagingcorresponding portions of another similar louver structure for rotationtherewith.

5.. A louver structure comprising a frame having perpendicularlydisposed top, bottom and side walls and a partition, disposed betweenthe side walls defining two rectangular passages, 21 1 pair of shuttersrespectively mounted in said two passages, each of said shuttersincluding a first slat disposed transversely across one of the passagesbetween one of the side walls and said partition and journaled for axialrotationtherebetween, said slat having a width substantially equalto theheight of the passage, a plurality of spaced parallel disks intersectingsaid slat at an acute angle to a central axis thereof, and a pair offurther slats smaller in width than the first slat and equal in axiallength thereto, said pair of slats being disposed parallel to the firstslat and spaced therefrom, said disks intersecting the smaller slats atsaid angle, said first slat, disks and smaller slats being formed as asingle unit rotatable in said one passage.

6. A louver structure according to claim 3, further comprising manuallyoperable means disposed outside of said side walls and operativelyjoined to said shutters for independently rotatingthe shutters in thepassages.

References Cited in the file of this patent UNITED STATES PATENTS676,261 Johnson June 11, 1901 2,107,386 Otto Feb. 8, 1939 2,528,130Frisk et a1. Oct. 31, 1950 2,555,009 Romano May 29, 1951 2,621,578 LabusDec. 16, 1952 2,632,375 Stair Mar. 24, 1953 2,646,741 Castle July 28,1953

